Dentium USA, Cypress, Calif, offers rainbow™ Gum, a soft-tissue model material. The material was designed and formulated to reproduce a natural tissue model with lifelike gingival color. Composed of polyvinylsiloxanes, rainbow Gum is scannable by CAD/CAM laser scanners and can produce flexible gingival masks for master models used in the dental laboratory. According to the company, there is no need to use a scan spray when using rainbow Gum during the CAD/CAM scanning process.   

Working time for rainbow Gum impression material is approximately 1½ minutes, with a complete cure time of 6½ minutes.